Sheet-metal lathing.



P H S 0 T N I G A M W m SHEET METAL LATHING. APPLICATION {ILED mums,1907.

ufz'iimssea' Jul/awful 7710mm WMacinfosfi Vide an. improved corr g andmoms WALKER" nic mrosn, or

PENSHURST, NEAR SYDNEY, NEW SOUTH WALES,

AUSTRALIA.

sneer-mama LATHING.

Specification of Letters Patent.

Application filed larch 25, 1907. Serial No. 864,228.

Patented May 12, 1908.

To all whom it may concern:

Be it known that I, THOMAS WALKER Maom'rosn, a subject of the King ofGreat Britain, resid' at Roseby street, Pens- -6 hurst, near Sy ney, inthe State of New South Wales and Commonwealth of Australia, mlllwright,have invented a new and useful Improved Sheet-Metal Lathing, of whichthe following is a specification.

This invention has been devised in order to orated sheet metal lathinwith projections to be used in substitution or laths in plaster wallsand the like which is manufactured in sections or sheets ada ted tointerlock one with the other and which is cheaper handier and moreeffective than substitutes forwood lathing ordinarily'used.

The improved sheet metal lathing consists of sheetiron or steel(preferabl galvanized steel) corrugated withpieces as ort distance apartalong its length punched from the convexlty of. a corrugation and bentover towards the next corrugation to form a projection with such a setthat two of these opposltel situated projections will form a doveta1l holow to receive and hold the plaster. The pro'ections in the corrugationsare set dlagon y that is the middle of one is oppos1te the space betweentwo on the next corrugation. At one edge of a section or sheet aparallel air of projections are bent over to one shot or to form a hookor a selvage of ap roximatelytubular formation adapted to tor'interlock' into a similar or corresponding tubular formation on theedge of the next section or sheet. But in order that the invention maybe readil understood the same will now be descri ed with reference tothe drawings accompanying and forming art 'of' this completespecification and in w 'ch Figure 1 is a perspective view of two sheetsof the improved metal lathing interlocked :sidewardly together Fig. 2 isa plan and Fig. 3 a cross sectional elevation on the plane 1-1 lofthesame.

Thisnnproved sheet metal la'thing with corrugations 4.and projections 5is manufaclaths, substantially as described.-

tured from galvanized sheet steel assed endwise into a machine withsuitab e rollers so arranged that the sheet will become corrugatedlengthwise as it passes along and then' punched in a straight sectorended fashion as 6 in the body-and reversely-to said punchings' in bothedges as at 7 and the punchings 5 and remainder edges 8 pressed from thecorrugations 4 and bent over on a mandrel to the required set preferablyas shown. The unchings 5 and the remaindersS .at one e go are bent overmore than the bodyipunchings 5 so as to form a selvage adapted to takeinto and between the similar unchings 7 and remainders 8 on the outer ege of/a similarly treated sheet. Sheets of' lathing may be formed fromthe individual pieces of lath, constructed as hereinbefore. described,of any required size, and by reason, of the interlocking or hinging'ofthe edges of said pieces of. lath,

square corners or n cessary curves may be made by the sheets withoutdismembering the same. I

In use these sheet metal lathings are 'nailed or otherwise fastened tothe studs or other support of a wall or ceiling or the like each sheetbeing interlocked at its ed es as described and the plaster is then srea over the sheetin and will be firmly he (1 thereon b the hoo -like ortubular formation or set of the punchings 5 and remainders 8.

Having fully described and ascertained In said invention and the mannerin which it 1s to be performed I declare that what I claim 1s:

1. As an article of manufacture, a'corrugated metallic piece of lathmade of a single plate having through each slope of corrugations a rowof apertures, said a ertures being formed by cutting the metal ate andbending a portion outwardly and fiackwardly towards the similar bentportions'of the nearest row of said apertures, the side edges of thelath being rovided with pro'ections which are similar y bent backwar yand being thereby adapted to interlock with adjacent .2. As an articleof manufacture asheet of metallic laths comprising two or more singlelaths, constructed as herein described and claimed, and interlocking ontheir edges, substantially as described.

. 3. In a sheet metal latlnng plate, the combination of two metalliclaths each having longitudinal exterior and interior open ribs connectedtogether by an integral Web, and interlocking e ges, substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of 10 two subscribing Witnesses.

THOMAS WALKER MAGINTOSH.

Witnesses FRED WALSH, PERCY NEWELL.

